Enter "str2mkryz" as a case-sensitive code to unlock the Gridiron field and NFL Legends team.

NFL Legends team

Go to all fields, including the EA field (eleven in all), and do a Hot Spot play. A message reading "You have earned [player's name]" will appear. You will now be able to get that player in the pickup pool. When you are on the last field, do a Hot Spot play and the message "Congratulations you have earned the NFL Legends team" will also appear under the player's name. The Legends and where they are unlocked are as follows:

Anthony Munoz: The Cage

Bo Jackson: Sportsplex

Chris Carter: The Alley

Darrell Green: The Backlot

Jack Lambert: Royal Park

Joey Browner: The Dig

Mean Joe Greene: The Tracks

Mike Singletary: Second St. Station

Randell Cunningham: Imperial Tower

Sterling Sharpe: The Aqueduct

Own The City completion bonuses

Successfully complete Own The City mode to get the option to export your player to Madden NFL 2006 and to your NFL Challenge team.

Easy NFL Challenge completion

In NFL Challenge mode, make a good QB and WR. You will be able to go all the way down the list and select "NFL Challenge". Do the NFL Challenge to unlock an NFL player. Do this until it shows that it is locked (you can fit fourteen NFL players). After it is locked, you should get an invitation to the tournament in downtown. Win the tournament and defeat the NFL Legends. After you do that, choose an NFL Legend and NFL Challenge mode will now be completed.

When you create the new team, make a QB with good speed and passing. Also, make two receivers that are good in terms of catching and speed and jumping. Then, go to the challenge modes. Go down to player challenges. First, play against the Ravens and acquire Ray Lewis. Then, go to the Broncos and get Champ Bailey. Then, go to the Giants and get Tiki Barber (or any other good RB). With the rest of the days, do the challenges and get your created player up better.

Easy interceptions

First, play Jump Ball Battle a lot to get some practice at being able to jump at the correct time. Then, on a real game, when the QB lofts the ball up, use the skills you acquired from Jump Ball Battle to get the easy interception.

Easy development points

When playing in NFL Challenge mode, enter a medal challenge where you can get either a Gold, Silver or Bronze. For example, go to the Sportsplex field (the baseball field) and go all the way down to the last challenge. It should say "Sack the QB three times in this play". After you complete the challenge, it should say: "You won [number] of development points", and have the choice to exit or retry the challenge. Choose "Retry Challenge". Keep doing this for however many times desired. When you go back to the main NFL Challenge menu, you will see that all the times you won the challenge, you kept the development points you won. If you did this a lot, you will have a large number of development points to spend on your players.

Extra credits

Have a saved game file from an EA game such as the original NFL Street, Madden NFL 2005, NBA Live 2005, NCAA Football 2005, Need For Speed: Underground 2, SSX 3, NBA Street: Volume 2, or GoldenEye: Rogue Agent on your memory card to get 25,000 extra credits.